Inventor · disambiguated record
George Ishikawa
Also filed as: ISHIKAWA GEORGE
75 granted patents·1 pending application·2,392 citations·filing 1991–2012
99Inventor score
Top patents by PatentIndex Score
76 records- 0198US5717510AOptimized optical transmission system for high capacity transmissionFUJITSU LTD·Filed 1995·Granted Feb 10, 1998·199 cites·36 claims
- 0296US6362913B2Optical modulation apparatus and method of controlling optical modulatorFUJITSU LTD·Filed 2001·Granted Mar 26, 2002·97 cites·16 claims
- 0395US6417945B2Optical wavelength multiplex transmission method and optical dispersion compensation methodFUJITSU LTD·Filed 2001·Granted Jul 9, 2002·30 cites·100 claims
- 0495US6081360AMethod and apparatus for optimizing dispersion in an optical fiber transmission line in accordance with an optical signal power levelFUJITSU LTD·Filed 1998·Granted Jun 27, 2000·147 cites·4 claims
- 0595US5696614AOptical wavelength multiplex transmission method and optical dispersion compensation methodFUJITSU LTD·Filed 1997·Granted Dec 9, 1997·85 cites·3 claims
- 0694US5917637AMethod of and device for driving optical modulator, and optical communications systemFUJITSU LTD·Filed 1996·Granted Jun 29, 1999·159 cites·29 claims
- 0790US5926297AOptical modulating device and optical modulating methodFUJITSU LTD·Filed 1997·Granted Jul 20, 1999·99 cites·31 claims
- 0890US5815294AOptical transmission system with transmission characteristic measuring deviceFUJITSU LTD·Filed 1997·Granted Sep 29, 1998·71 cites·7 claims
- 0990US5602666AOptical dispersion compensation method for shifting a zero dispersion wavelength of an optical fiber to compensate for dispersion in an optical systemFUJITSU LTD·Filed 1995·Granted Feb 11, 1997·56 cites·19 claims
- 1089US6320687B1Dispersion compensation apparatus including a fixed dispersion compensator for coarse compensation and a variable dispersion compensator for fine compensationFUJITSU LTD·Filed 1998·Granted Nov 20, 2001·80 cites·49 claims
- 1188US6661974B1Optical transmitter and optical transmission systemFUJITSU LTD·Filed 1999·Granted Dec 9, 2003·102 cites·26 claims
- 1288US5636046AOptical dispersion compensation method using transmissible band determined from synergetic effect of self phase modulation and group velocity dispersionFUJITSU LTD·Filed 1995·Granted Jun 3, 1997·48 cites·12 claims
- 1386US6925262B2Method and system for compensating chromatic dispersionFUJITSU LTD·Filed 2001·Granted Aug 2, 2005·32 cites·21 claims
- 1486US6384943B2Optical wavelength multiplex transmission method and optical dispersion compensation methodFUJITSU LTD·Filed 2001·Granted May 7, 2002·13 cites·44 claims
- 1586US5805321AControl unit for optical modulators producing multiplexed optical output signalFUJITSU LTD·Filed 1996·Granted Sep 8, 1998·83 cites·11 claims
- 1684US7925171B2Optical transmission apparatusFUJITSU LTD·Filed 2006·Granted Apr 12, 2011·11 cites·18 claims
- 1784US5896217AOptical transmission system, optical multiplexing transmission system, and related peripheral techniquesFUJITSU LTD·Filed 1997·Granted Apr 20, 1999·46 cites·11 claims
- 1883US6243176B1Optical wavelength multiplex transmission method and optical dispersion compensation methodFUJITSU LTD·Filed 1997·Granted Jun 5, 2001·34 cites·116 claims
- 1983US5991477AOptical transmission system, optical multiplexing transmission system, and related peripheral techniquesFUJITSU LTD·Filed 1998·Granted Nov 23, 1999·80 cites·11 claims
- 2083US5754322AOptical transmission system, optical multiplexing transmission system, and related peripheral techniquesFUJITSU LTD·Filed 1997·Granted May 19, 1998·43 cites·18 claims
- 2182US6278539B1Optical modulation apparatus and method of controllingFUJITSU LTD·Filed 1999·Granted Aug 21, 2001·58 cites·25 claims
- 2281US7583895B2Polarization scrambler, optical add/drop multiplexer, optical route switching apparatus and wavelength division multiplexing optical transmission systemFUJITSU LTD·Filed 2006·Granted Sep 1, 2009·7 cites·19 claims
- 2381US5909297ADrift compensating circuit for optical modulators in an optical systemFUJITSU LTD·Filed 1997·Granted Jun 1, 1999·70 cites·14 claims
- 2480US5612807AOptical dispersion compensation method for shifting a zero dispersion wavelength of an optical fiber to compensate for dispersion in an optical systemFUJITSU LTD·Filed 1995·Granted Mar 18, 1997·31 cites·19 claims
- 2579US8320772B2Optical transmission apparatusOOI HIROKI·Filed 2011·Granted Nov 27, 2012·5 cites·4 claims
- 2679US7860408B2Interferometer for demodulating differential M-phase shift keying signalFUJITSU LTD·Filed 2007·Granted Dec 28, 2010·9 cites·2 claims
- 2779US7035548B2Polarization-mode dispersion detecting method, and a dispersion compensation controlling apparatus and a dispersion compensation controlling methodFUJITSU LTD·Filed 2004·Granted Apr 25, 2006·16 cites·15 claims
- 2879US6606424B2Apparatus and method for optical modulation and demodulationFUJITSU LTD·Filed 2000·Granted Aug 12, 2003·20 cites·29 claims
- 2976US8463135B2Relay apparatus, signal processing apparatus and optical communication systemSONE KYOSUKE·Filed 2010·Granted Jun 11, 2013·4 cites·12 claims
- 3076US8086109B2Polarization multiplexed optical transmitting and receiving apparatusYUKI MASAHIRO·Filed 2008·Granted Dec 27, 2011·6 cites·13 claims
- 3176US7006770B2Optical receiving station, optical communication system, and dispersion controlling methodFUJITSU LTD·Filed 2001·Granted Feb 28, 2006·12 cites·15 claims
- 3276US6728491B1Polarization-mode dispersion detecting method, and a dispersion compensation controlling apparatus and a dispersion compensation controlling methodFUJITSU LTD·Filed 1999·Granted Apr 27, 2004·44 cites·12 claims
- 3375US5917628AOptical time-division multiplexer capable of supplying stable output signalFUJITSU LTD·Filed 1997·Granted Jun 29, 1999·41 cites·9 claims
- 3475US5870213AOptical transmission system, optical multiplexing transmission system, and related peripheral techniquesFUJITSU LTD·Filed 1998·Granted Feb 9, 1999·51 cites·16 claims
- 3574US6573985B2Wavelength dispersion measuring device and a method thereofFUJITSU LTD·Filed 2001·Granted Jun 3, 2003·17 cites·21 claims
- 3674US6411416B1Method and apparatus for minimizing the intensity of a specific frequency component of an optical signal travelling through an optical fiber transmission line to thereby minimize the total dispersionFUJITSU LTD·Filed 1998·Granted Jun 25, 2002·46 cites·74 claims
- 3772US8571058B2Terminal apparatus, data transmission system and data transmission methodSONE KYOSUKE·Filed 2010·Granted Oct 29, 2013·3 cites·3 claims
- 3872US7480459B2Wavelength division multiplexing transmission systemFUJITSU LTD·Filed 2004·Granted Jan 20, 2009·10 cites·36 claims
- 3972US6829440B2Method and apparatus for compensation of polarization-mode dispersionFUJITSU LTD·Filed 2001·Granted Dec 7, 2004·13 cites·21 claims
- 4072US6809849B2Control apparatus and control method for an optical methodFUJITSU LTD·Filed 2003·Granted Oct 26, 2004·12 cites·10 claims
- 4170US7853152B2Signal regeneration device, optical receiver, and signal processing methodFUJITSU LTD·Filed 2006·Granted Dec 14, 2010·4 cites·11 claims
- 4270US7433599B2Automatic dispersion compensation device and compensation methodFUJITSU LTD·Filed 2003·Granted Oct 7, 2008·11 cites·17 claims
- 4370US7389049B2Chromatic dispersion compensation controlling systemFUJITSU LTD·Filed 2004·Granted Jun 17, 2008·11 cites·2 claims
- 4470US7218856B2System for compensating for chromatic dispersion and polarization mode dispersionFUJITSU LTD·Filed 2004·Granted May 15, 2007·11 cites·22 claims
- 4570US6865305B2Adaptively controllable polarization mode dispersion compensatorFUJITSU LTD·Filed 2003·Granted Mar 8, 2005·10 cites·9 claims
- 4670US6118564AOptical time division demultiplexing apparatus and demultiplexed signal switching method as well as optical time division multiplex transmission systemFUJITSU LTD·Filed 1997·Granted Sep 12, 2000·35 cites·56 claims
- 4769US6909851B2Dispersion compensation apparatus including a fixed dispersion compensator for coarse compensation and a variable dispersion compensator for fine compensationFUJITSU LTD·Filed 2001·Granted Jun 21, 2005·8 cites·12 claims
- 4869US5982530AApparatus for driving an optical modulator to measure, and compensate for, dispersion in an optical transmission lineFUJITSU LTD·Filed 1999·Granted Nov 9, 1999·29 cites·11 claims
- 4969US5760937AOptical demultiplexerFUJITSU LTD·Filed 1997·Granted Jun 2, 1998·39 cites·11 claims
- 5067US8213798B2Optical transmission apparatus, wavelength division multiplexing optical communication system and optical transmission methodOOI HIROKI·Filed 2010·Granted Jul 3, 2012·2 cites·10 claims
Showing the top 50 of 76 patent records by PatentIndex Score.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →